On Thu, 30 May 2019 16:18:11 +0300 Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote: > From: Paul Cercueil <paul.cercueil@xxxxxxxxxx> > > This change adds support for the ADA4961 BiCMOS RF Digital Gain Amplifier, > (DGA), which is optimized for driving heavy loads out 2.0 GHz and beyond. > The device typically achieves -90 dBc IMD3 performance at 500 MHz and > -85 dBc at 1.5 GHz. > > Datasheet link: > http://www.analog.com/media/en/technical-documentation/data-sheets/ADA4961.pdf > > This change re-uses the existing ad8366 driver, as most logic is similar. > Also, this chip has a reset pin which is initialized during probe. > > Signed-off-by: Paul Cercueil <paul.cercueil@xxxxxxxxxx> > Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> I'm fairly sure you want a GPIOLIB kconfig dependency. I've added it rather than going for a v2 for just that. Give me a shout if it's not actually required! Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > drivers/iio/amplifiers/Kconfig | 9 ++++++--- > drivers/iio/amplifiers/ad8366.c | 34 +++++++++++++++++++++++++++++++-- > 2 files changed, 38 insertions(+), 5 deletions(-) > > diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig > index da5830da9bcf..259058da8811 100644 > --- a/drivers/iio/amplifiers/Kconfig > +++ b/drivers/iio/amplifiers/Kconfig > @@ -7,12 +7,15 @@ > menu "Amplifiers" > > config AD8366 > - tristate "Analog Devices AD8366 VGA" > + tristate "Analog Devices AD8366 and similar Gain Amplifiers" > depends on SPI > select BITREVERSE > help > - Say yes here to build support for Analog Devices AD8366 > - SPI Dual-Digital Variable Gain Amplifier (VGA). > + Say yes here to build support for Analog Devices AD8366 and similar > + gain amplifiers. This driver supports the following gain amplifiers > + from Analog Devices: > + AD8366 Dual-Digital Variable Gain Amplifier (VGA) > + ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > > To compile this driver as a module, choose M here: the > module will be called ad8366. > diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c > index 1beda6409301..0a9883e8eb2e 100644 > --- a/drivers/iio/amplifiers/ad8366.c > +++ b/drivers/iio/amplifiers/ad8366.c > @@ -1,6 +1,9 @@ > // SPDX-License-Identifier: GPL-2.0 > /* > - * AD8366 SPI Dual-Digital Variable Gain Amplifier (VGA) > + * AD8366 and similar Gain Amplifiers > + * This driver supports the following gain amplifiers: > + * AD8366 Dual-Digital Variable Gain Amplifier (VGA) > + * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > * > * Copyright 2012-2019 Analog Devices Inc. > */ > @@ -11,6 +14,7 @@ > #include <linux/sysfs.h> > #include <linux/spi/spi.h> > #include <linux/regulator/consumer.h> > +#include <linux/gpio/consumer.h> I'd be highly surprised if this didn't need a KCONFIG dependency change... > #include <linux/err.h> > #include <linux/module.h> > #include <linux/bitrev.h> > @@ -20,6 +24,7 @@ > > enum ad8366_type { > ID_AD8366, > + ID_ADA4961, > }; > > struct ad8366_info { > @@ -31,6 +36,7 @@ struct ad8366_state { > struct spi_device *spi; > struct regulator *reg; > struct mutex lock; /* protect sensor state */ > + struct gpio_desc *reset_gpio; > unsigned char ch[2]; > enum ad8366_type type; > struct ad8366_info *info; > @@ -46,6 +52,10 @@ static struct ad8366_info ad8366_infos[] = { > .gain_min = 4500, > .gain_max = 20500, > }, > + [ID_ADA4961] = { > + .gain_min = -6000, > + .gain_max = 15000, > + }, > }; > > static int ad8366_write(struct iio_dev *indio_dev, > @@ -62,6 +72,9 @@ static int ad8366_write(struct iio_dev *indio_dev, > st->data[0] = ch_b >> 4; > st->data[1] = (ch_b << 4) | (ch_a >> 2); > break; > + case ID_ADA4961: > + st->data[0] = ch_a & 0x1F; > + break; > } > > ret = spi_write(st->spi, st->data, indio_dev->num_channels); > @@ -90,6 +103,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, > case ID_AD8366: > gain = code * 253 + 4500; > break; > + case ID_ADA4961: > + gain = 15000 - code * 1000; > + break; > } > > /* Values in dB */ > @@ -130,6 +146,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, > case ID_AD8366: > code = (gain - 4500) / 253; > break; > + case ID_ADA4961: > + code = (15000 - gain) / 1000; > + break; > } > > mutex_lock(&st->lock); > @@ -164,6 +183,10 @@ static const struct iio_chan_spec ad8366_channels[] = { > AD8366_CHAN(1), > }; > > +static const struct iio_chan_spec ada4961_channels[] = { > + AD8366_CHAN(0), > +}; > + > static int ad8366_probe(struct spi_device *spi) > { > struct iio_dev *indio_dev; > @@ -193,6 +216,12 @@ static int ad8366_probe(struct spi_device *spi) > indio_dev->channels = ad8366_channels; > indio_dev->num_channels = ARRAY_SIZE(ad8366_channels); > break; > + case ID_ADA4961: > + st->reset_gpio = devm_gpiod_get(&spi->dev, "reset", > + GPIOD_OUT_HIGH); > + indio_dev->channels = ada4961_channels; > + indio_dev->num_channels = ARRAY_SIZE(ada4961_channels); > + break; > default: > dev_err(&spi->dev, "Invalid device ID\n"); > ret = -EINVAL; > @@ -238,6 +267,7 @@ static int ad8366_remove(struct spi_device *spi) > > static const struct spi_device_id ad8366_id[] = { > {"ad8366", ID_AD8366}, > + {"ada4961", ID_ADA4961}, > {} > }; > MODULE_DEVICE_TABLE(spi, ad8366_id); > @@ -254,5 +284,5 @@ static struct spi_driver ad8366_driver = { > module_spi_driver(ad8366_driver); > > MODULE_AUTHOR("Michael Hennerich <michael.hennerich@xxxxxxxxxx>"); > -MODULE_DESCRIPTION("Analog Devices AD8366 VGA"); > +MODULE_DESCRIPTION("Analog Devices AD8366 and similar Gain Amplifiers"); > MODULE_LICENSE("GPL v2");
